... IP MODEM 1. A kind of data terminal device that provides data transfer function by public ... intelligent transportation, smart grid, industrial automation, telemetry, finance, POS, water supply, environment protection, post, weather, and so ... reverse-voltage and overvoltage protectionCellular AntennaInterfaceZigBee Antenna Interface Terminal Block SIM/UIM Port Power InputItemContentStandard PowerDC 12V/ ...